Effect of annealing temperature on mechanical properties of cold-rolled DP980 steel

doi:10.13251/j.issn.0254-6051.2020.01.002

Abstract

Abstract: Continuous annealing experiments were carried out on the DP980 tested steel by means of continuous annealing simulator. The evolution of microstructure and the change of mechanical properties of experimental steel under different annealing temperatures (775, 800, 825, 850 ℃) were studied by means of SEM, EBSD and TEM. The results show that with the annealing temperature increasing, the yield strength of the steel increases gradually from 705 MPa to 850 MPa, the tensile strength and the elongation after fracture decrease gradually (tensile strength reduced from 1150 MPa to 1030 MPa; elongation reduced from 8.9% to 5.3%), which are closely related to the structure and morphology of the sample. In addition, the hardening rate curves of the experimental steels show a monotonous decline at different annealing temperatures.

Key words: annealing temperature, DP980 steel, microstructure, mechanical properties, work hardening

CLC Number:

TG142.2

Kang Tao, Guo Jie, Zhou Wei, Chen Jun, Kuang Chunfu, Zhao Zhengzhi. Effect of annealing temperature on mechanical properties of cold-rolled DP980 steel[J]. HTM, 2020, 45(1): 6-10.

References

[1]刘志桥, 陈刚, 张志建, 等. 退火工艺对DP590双相钢组织与力学性能的影响[J]. 金属热处理, 2019, 44(10): 87-90.
Liu Zhiqiao, Chen Gang, Zhang Zhijian, et al. Effect of annealing process on microstructure and mechanical properties of DP590 dual-phase steel[J]. Heat Treatment of Metals, 2019, 44(10): 87-90.
[2]马二清, 崔磊, 詹华, 等. 退火温度对800 MPa级热镀锌双相钢组织和性能的影响[J]. 安徽冶金, 2016(3): 14-16.
Ma Erqing, Cui Lei, Zhan Hua, et al. Effect of annealing temperature on the microstructure and Mechanical properties of 800 MPa hot-dip galvanized dual-phase steel[J]. Anhui Metallurgy, 2016(3): 14-16.
[3]刘华赛, 谢春乾, 李振, 等. C-Si-Mn-Cr双相钢组织与性能的柔性控制技术[J]. 金属热处理, 2019, 44(8): 131-135.
Liu Huasai, Xie Chunqian, Li Zhen, et al. Flexible control on microstructure and mechanical properties of C-Si-Mn-Cr dual phase steel[J]. Heat Treatment of Metals, 2019, 44(8): 131-135.
[4]杨贵敏. DP590冷轧双相钢组织性能研究[D]. 沈阳: 东北大学, 2010.
Yang Guimin. Microstructures and properties of cold rolled DP590[D]. Shenyang: Northeastern University, 2010.
[5]邢振环, 张涛, 郭志凯, 等. 退火温度对DP980冷轧双相钢组织和力学性能的影响[J]. 热加工工艺, 2019, 48(12): 172-174.
Xing Zhenhuan, Zhang Tao, Guo Zhikai, et al. Effects of annealing temperature on microstructure and mechanical properties of DP980 cold rolled dual phase steel[J]. Hot Working Technology, 2019, 48(12): 172-174.
[6]金光灿, 赵征志, 徐刚, 等. 1000 MPa 热镀锌双相钢组织和断裂机理[J]. 北京科技大学学报, 2009, 31(10): 1245-1249.
Jin Guangcan, Zhao Zhengzhi, Xu Gang, et al. Microstructure and fracture mechanism of 1000 MPa hot dip galvanized dual phase steel[J]. Journal of University of Science and Technology Beijing, 2009, 31(10): 1245-1249.
[7]冯太国, 亢占英. 连续退火工艺对冷轧热镀锌双相钢 780DP 性能的影响[J]. 宝钢技术, 2012(4): 11-14.
Fen Taiguo, Kang Zhanying. Effect of continuous annealing technology on mechanical properties of CR hot-dip galvanized 780DP steel[J]. Baosteel Technology, 2012(4): 11-14.
[8]马光, 陈新, 卢理成, 等. 薄规格取向硅钢二次再结晶过程中 Goss 织构演变的 Monte Carlo 模拟[J]. 材料导报, 2018, 32(2): 313-315.
Ma Guang, Chen Xin, Lu Licheng, et al. Monte Carlo simulation of the evolution of goss texture in secondary recrystallization of thin gauge grain oriented silicon steel[J]. Materials Review, 2018, 32(2): 313-315.

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